Poorly

[Hina Muqadas]

In a poor manner or condition; without plenty, or
sufficiency, or suitable provision for comfort; as, to live poorly.

[Becky]

Is an Umbrella word for Ill. It could mean any illness. Used in England and maybe other uk countries.

[Sarah]

Poorly is the sugar-coated way of saying you feel like shit!

[Justin Bieber]

[ill, brilliant, wicked, sick, best] meaning something that is better than other things of the same type.